From f1511737680385da81972bb76ec1ba1f2b6c46a1 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Fri, 27 Jan 2017 23:31:03 +0100
Subject: parse file-haser config as json from stdin


diff --git a/sample/file-hasher-requst.json b/sample/file-hasher-requst.json
new file mode 100644
index 0000000..4ef0497
--- /dev/null
+++ b/sample/file-hasher-requst.json
@@ -0,0 +1,10 @@
+{
+    "threads": 2,
+    "dir": [
+        "../../../../Music/Dead Man's Bones - Dead Man's Bones (2009)",
+        "../../../../Music/Hozier - Hozier"
+    ],
+    "m3u": [
+        "../../../../Music/Hozier - From Eden/00-hozier-from_eden_ep-web-2014.m3u"
+    ]
+}
diff --git a/src/file-hasher/hasher.go b/src/file-hasher/hasher.go
index afc35fd..27574f9 100644
--- a/src/file-hasher/hasher.go
+++ b/src/file-hasher/hasher.go
@@ -90,7 +90,7 @@ func (h *Hasher) collectHashes(C <-chan string) (wg *sync.WaitGroup) {
 }
 
 func (h *Hasher) ComputeHashes(w Walker) (err error) {
-	C := make(chan string, 10)
+	C := make(chan string, h.numThreads*2)
 
 	wg := h.collectHashes(C)
 
@@ -106,5 +106,9 @@ func (h *Hasher) ComputeHashes(w Walker) (err error) {
 func NewHasher(numThreads uint, stdlog *log.Logger) (h *Hasher) {
 	h = &Hasher{numThreads: numThreads, stdlog: stdlog}
 	h.Files = make(map[string]string)
+	if h.numThreads < 1 {
+		h.numThreads = 4
+	}
+	stdlog.Printf("*** Created blake2b based hasher (%d threads)", h.numThreads)
 	return
 }
diff --git a/src/file-hasher/main.go b/src/file-hasher/main.go
index 3e32b63..f360705 100644
--- a/src/file-hasher/main.go
+++ b/src/file-hasher/main.go
@@ -30,45 +30,56 @@ import (
 	"time"
 )
 
-const (
-	RD_CONF = "/etc/rd.conf"
-)
+type Request struct {
+	NumThreads   uint     `json:"threads"`
+	Directories  []string `json:"dir"`
+	M3UPlaylists []string `json:"m3u"`
+}
 
 func main() {
-	if len(os.Args) < 2 {
-		log.Fatal("Usage: file-hasher <directory> [ <directory [ .. ] ]")
-	}
-	directories := os.Args[1:]
-
 	stdlog := log.New(os.Stderr, "[std] ", log.LstdFlags)
 
+	var req Request
+	if err := json.NewDecoder(os.Stdin).Decode(&req); err != nil {
+		stdlog.Fatalf("Error decoding request: %v", err)
+	}
+
 	C := make(chan os.Signal, 1)
 	signal.Notify(C, os.Interrupt, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGTERM)
 
-	stdlog.Println("***************************************************************")
-	stdlog.Printf("*** will hash files' from %d directories", len(directories))
-	stdlog.Println("***************************************************************")
-
 	starttime := time.Now()
 	go func() {
 		defer func() {
 			C <- syscall.SIGTERM
 		}()
+		stdlog.Println("***************************************************************")
+		h := NewHasher(req.NumThreads, stdlog)
+		stdlog.Println("")
+		stdlog.Println("******************************")
 
-		stdlog.Println("********************************************")
-		h := NewHasher(4, stdlog) // TODO: make number of threads configurable
-		for _, root := range directories {
+		for _, root := range req.Directories {
 			src := NewDir(root, stdlog)
 			stdlog.Printf("*** hashing all the files in '%s'", root)
 			stdlog.Println("")
 			if err := h.ComputeHashes(src); err != nil {
 				stdlog.Println("")
-				stdlog.Printf("ERROR: %v", err)
-				return
+				stdlog.Fatalf("ERROR: %v", err)
 			}
 			stdlog.Println("")
 			stdlog.Println("******************************")
 		}
+		for _, list := range req.M3UPlaylists {
+			src := NewM3u(list, stdlog)
+			stdlog.Printf("*** hashing all the files from '%s'", list)
+			stdlog.Println("")
+			if err := h.ComputeHashes(src); err != nil {
+				stdlog.Println("")
+				stdlog.Fatalf("ERROR: %v", err)
+			}
+			stdlog.Println("")
+			stdlog.Println("******************************")
+		}
+
 		stdlog.Println("")
 		stdlog.Println("***************************************************************")
 		stdlog.Printf("***  hashed %d files in %v", len(h.Files), time.Since(starttime))
@@ -76,7 +87,7 @@ func main() {
 
 		enc := json.NewEncoder(os.Stdout)
 		if err := enc.Encode(h.Files); err != nil {
-			stdlog.Printf("Error encoding JSON: %v", err)
+			stdlog.Fatalf("Error encoding Result: %v", err)
 		}
 	}()
 
-- 
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